AirHint found the following cheapest one-way flights from San Antonio (SAT) to Phoenix (PHX) in December 2025 (see full year).
One-Way flights
| 30 Dec | Frontier Airlines | direct | |
| 31 Dec | Frontier Airlines | ||
| 28 Dec | Frontier Airlines | ||
| 28 Dec | Frontier Airlines | direct | |
| 31 Dec | Southwest Airlines | direct |
Also check the deals for return flights from San Antonio to Phoenix in December.
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